The Collaborative International Dictionary of English v.0.48:
nonsectarian \nonsectarian\ adj. not restricted to one sect or school or party; as, religious training in a nonsectarian atmosphere; public funding is restricted to nonsectarian colleges. Opposite of sectarian. [Narrower terms: ecumenic, oecumenic, ecumenical, oecumenical; interchurch, interdenominational; nondenominational; {undenominational, unsectarian ] [WordNet 1.5]